What is the purpose of archive logs?
The archive log files are included in database backups and are used for roll-forward recovery of the database to the current point-in-time. All logs since the last full database backup must be available to the restore function. These log files are stored in the archive log.
What is the advantage of operating in Archivelog mode?
Running the database in ARCHIVELOG mode has the following benefits: The database can be recovered from both instance and media failure. Backups can be performed while the database is open and available for use.
What is the use of Archivelog in Oracle?
What Is the Archived Redo Log? Oracle Database lets you save filled groups of redo log files to one or more offline destinations, known collectively as the archived redo log, or more simply the archive log. The process of turning redo log files into archived redo log files is called archiving.
What is the use of LogMiner in Oracle?
Oracle LogMiner, which is part of Oracle Database, enables you to query online and archived redo log files through a SQL interface. Redo log files contain information about the history of activity on a database.
What happens when you run a database in archivelog mode?
When you run a database in ARCHIVELOG mode, you enable the archiving of the redo log. The database control file indicates that a group of filled redo log files cannot be reused by LGWR until the group is archived.
How to see the archive of a log file?
Requests a display that shows the range of redo log files to be archived, the current log file group’s sequence number, and the current archive destination (specified by either the optional command text or by the initialization parameter LOG_ARCHIVE_DEST). If you are using both ARCHIVELOG mode and automatic archiving, the display might appear like:
What is the use of archivelogs in Oracle 11g?
The 2-day dba documents are very good. If your database is running in ARCHIVELOG mode, it copies all transactions to the archivelog destination. The transactions are always written to the redolog files but when they are full, they are only saved when running in archivelog mode.
How are redo log files turned into archived files?
The process of turning redo log files into archived redo log files is called archiving. This process is only possible if the database is running in ARCHIVELOG mode. You can choose automatic or manual archiving. An archived redo log file is a copy of one of the filled members of a redo log group.